Hi I have a 2004 Ford Explorer. The door ajar light and chime comes on when I reach a speed of between 45-50 mph. If I drive below 40 mph, the light does not come on. What’s annoying is that the door ajar light/chime continuously flickers on and off while driving at accelerated speeds. The faster the acceleration, the more often the light/chime flickers on/off. When I come to a stop, if I slam the door shut a few times, the light will turn off. I've replaced the driver’s side door ajar sensor, but this did not resolve the issue. It sounds like sometype of short. Any assistance will be greatly appreciated.